2,3,4,5-tetrachloro-1,1-dimethoxycyclopenta-2,4-diene, 5,5-dimethoxy-1,2,3,4-tetrachlorocyclopenta-1,3-diene, 1,3-Cyclopentadiene,1,2,3,4-tetrachloro-5,5-dimethoxy, 5,5-Dimethoxy-1,2,3,4-tetrachlorocyclopentadiene, 2,3,4,5-tetrachlorocyclopentadienone dimethyl acetal, 1,3-Cyclopentadiene, 1,2,3,4-tetrachloro-5,5-dimethoxy-, 1,2,3,4-Tetrachloro-5,5-dimethoxycyclopentadiene, 1,1-dimethoxy-2,3,4,5-tetrachlorocyclopentadiene